Effect of regular wavefront perturbations on the structural transformation of laser beams

The effect of a regular phase modulation on the dynamics of variation in spatial characteristics of laser radiation is studied. The conditions and processes of the transformation of phase aberrations to topological wavefront perturbations resulting in the appearance of edge and screw dislocations are considered. The relationship between the caustic and dislocation elements of the laser beam is discussed. It is shown that the phase modulation leads to the formation of narrow channels with an increased intensity inside the laser beam.